Revealing mistake: When the white gown enters Ms. Price's house, before it starts dancing with Prof. Brown, a string holding it is visible.
Continuity mistake: The green skirt that comes alive smacks Ms. Price's nape and sends her glasses to the tip of her nose. In the following angle they are perfectly placed.
Revealing mistake: When Ms. Price starts to make the shoes move, the strings attached are visible.
Visible crew/equipment: At the end of the film, taking place in a sunny field, Paul holds the bedknob and in both of the final shots about 3 or 4 lighting screens are reflected.
Continuity mistake: When the soccer match ends, the lion king rests on the goal and you can see the damages done. In the immediate wide angle, the goalie has totally different damages.
Continuity mistake: Before Ms. Price makes the army move, she grabs her broom and the position and shape of the handkerchief on her blouse differs between the first and the angle following.
Revealing mistake: The first view of Portobello Road is a painting because the smoke from the chimneys is motionless.
Continuity mistake: The position of Paul's fingers, specially his thumb, when holding the bedknob in the last shot, differs totally from one frame to another.
Continuity mistake: Before Ms. Price arrives in town, during the scene where the old soldiers arrive singing, the light keeps changing from semi dark to really sunny in less than 20 seconds.
Revealing mistake: When Ms. Price is trying to fly on her broom, a wire holding it is visible.
Visible crew/equipment: When the rabbit jumps on Ms. Price's lap, she tells him to jump off. Watch the close-up and a stunt's red hand appears from where her belly is supposed to be and pushes the animal away.
Continuity mistake: When Paul says that the magic word are written on his book (Trecorum, etc.), Ms. Price extends her arm and points her finger at an illustration. in the close-up her hand is away from the book and repeats the previous movement.
Continuity mistake: The white gown attacks the priest and covers him completely. In the following angle it's just covering a small part of him.
Visible crew/equipment: When Ms. Price is riding her broom in the beginning, you can sometimes see that she is not riding a broomstick but instead a saddle-like mechanical object.
Continuity mistake: Before the bed lands in the house, after visiting Portobello, the cat's tail is straight, a shot later it's curled around his body.
Continuity mistake: When Ms. Price and the kids are imprisoned, Paul is trying to sneak in between the iron bars, with his head semi-squashed. A frame later, in a new angle, his body and head have been noticeably moved away to let the poor kid's blood flow.
Continuity mistake: A hat falls on Paul and its two blue laces get positioned disorderly. In the following angle they are perfectly aligned.
Continuity mistake: When everyone's trying to recall the words on the medal, there's a shot of Paul reading his book. Depending on the angle, he holds it close to his face or at waist level.
Continuity mistake: When Captain Grian greets the old officer, the position of his arm changes between the front and back shot, you can tell by the absence of wrinkles on his sleeve.
Continuity mistake: The troop of old soldiers following the general before Ms. Price arrives, disappears in a time span of 3 seconds without making any noise.
Answer: Don't know what it was like in the forties, but we were there in 2010. Wonderful place to visit. So animated. Not only were their vendors, but there were Street entertainers as well. What I found amusing was before you get to the part of Portobello Road where there were these vendors, you had to go past the stately homes with gated grounds. Expensive cars with pull into the drives. Wouldn't happen here in the United States.